3 results about "NODAL" patented technology

The invention provides a control node locating protecting method of undercutting channel segment water level lowering amplitude. The method comprises the steps that a lateral erosion zone and a deep erosion zone are divided; a target channel section is subjected to meshing, a plane two-dimension water flow mathematic model is established, parameter calibration and verification are carried out; a protection project is generalized to the plane two-dimension water flow mathematic model, the arranging zone and the width of the protecting project are determined; local gradient amplification and upstream water level amplification corresponding to each working condition are obtained, mesh sequences are analyzed respectively; key nodes or other nodes which have obvious influence are selected, for lateral erosion nodes, a hidden closure dam and a beach protection part are arranged on a river branch or a bottomland, and for deep erosion nodes, a bottom protecting band or a hidden closure dam are placed in a main groove. According to the method, nodes are divided into the lateral erosion nodes and the deep erosion nodes, protection part difference of the nodes in different types is provided, by comparing the efficiency of a local channel segment arranging protecting project, the positions of the nodes are accurately located, and the optimum efficiency of the protecting project is guaranteed powerfully.

This invention relates to the field of finite element stress calculation technology, specifically to an aortic stress calculation system based on finite element analysis. In this invention, multiple sets of aortic displacement vectors and element stress vectors are spliced ​​into a response matrix according to the sequence of nodal degrees of freedom and element numbering. The Gram-Schmidt orthogonalization method is introduced to process the retained vectors, compressing the directional coincident components and linearly correlated components, resulting in stronger stability of the reduced-order basis space and smoother conversion of high-dimensional discrete equations to low-dimensional expressions. The Newton-Raphson algorithm is introduced in the path state update stage, where load step difference, nodal displacement increment, and integral point stress tensor are continuously recorded. The path turning state and load propagation form are adjusted synchronously. Facing high internal pressure, large deformation, and nonlinear response scenarios, peak tracking continuity is stronger, the frequency of solving repeated integral models is reduced, the high-risk area of ​​the aortic wall is more concentrated, and the numerical support for scheme comparison, parameter scanning, and risk pre-assessment is more sufficient.

The present disclosure provides a mechanics calculation method and apparatus for a pipeline. The method includes: generating a pipe-beam model formed by connecting a plurality of pipe-beam elements; generating a target shell component mesh model formed by joining a plurality of shell elements; replacing, with the target shell component mesh model, a pipe-beam element at a corresponding position in the pipe-beam model to form a hybrid model; performing finite element calculation on the hybrid model to obtain a displacement of each node of the hybrid model; calculating nodal internal forces of the pipe-beam elements based on nodal displacements of the pipe-beam elements; calculating stresses of the respective shell elements based on mesh nodal displacements of the target shell component mesh model; and calculating stresses of the pipe-beam elements based on the nodal internal forces of the pipe-beam elements.